As you speed around the Internet checking out the various online casinos available to you, be sure that you stop and check out the fees of each one. If you were touring casinos in a vehicle (those brick and mortar style casinos) then you would be looking for admission costs and transfer of funds costs associated with playing at the casino. In this case, though, you are looking for other fees you need to pay to play at the casino.
Some casinos do charge fees to those who play with them. These fees may be in the form of memberships or fees for depositing or withdrawing funds from your account. If you are actually paying any fees, it is important to keep in mind the costs of those fees and compare each of the casinos by the amount of fee you have to pay to play there. This is a good way to find the more lucrative casinos available.